The Big Bang Theory
S04E1620 min· aired 2/17/2011
The Cohabitation Formulation
TMDb7.5
Overview
As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.
As Wolowitz contemplates taking things with Bernadette to the next level, Leonard rekindles his relationship with Raj's sister.